In a single throw of $2$ dice,find the probability of getting a total of $8.$

$A$ card is drawn at random from a pack of cards. What is the probability that the drawn card is neither a heart nor a king?

$A$ problem in Mathematics is given to three students $A, B$,and $C$. Their respective probabilities of solving the problem are $\frac{1}{2}, \frac{1}{3}$,and $\frac{1}{4}$. What is the probability that the problem is solved?

When $2$ dice are thrown,find the probability of getting a sum that is a prime number.

What is the chance that a leap year,selected at random,will contain $53$ Sundays (in $/7$)?

$A$ bag contains $4$ white balls and $2$ black balls. Another bag contains $3$ white balls and $5$ black balls. If one ball is drawn from each bag,then the probability that both the balls are black,is